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On this page I found listed under "Software & drivers" the Firmware Upgrade Software 42PF7220A/37 v1.5.0.0

I downloaded the compressed file and extracted it to a USB Flash Drive. After you extract the file you will have 2 files...."autorun.upg" and a "readme.txt".Print out the readme file the delete it off the USB Flash DriveMake sure the USB Flash Drive has only one file on it (autorun.upg)

Make sure the TV is turned off.
Put the USB Flash Drive in any of the USB ports on the TV.
Turn the TV power on with the Power Button on the righthand side of the TV.
The TV will display an Update screen.
Let the TV run through all 3 processes.
Turn the TV off and remove the USB Flash Drive.
Power the TV back up.
Hopefully the Updates fixed the problem.....

looking into the back of the tv with the cover removed, there is 2 boards on the far left the run down the back of the screen. These are the Ysus buffer boards.They both plug into a larger board (Ysus). Make sure that the bottom buffer board is pushed into the Ysus properly and that the wired lead connecting the upper buffer board to the lower buffer board is pushed in firmly.If this doesnt solve the problem then you will most probably have a faulty lower buffer board.

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Related Questions:

We have to ensure that the input device is not causing this problem. So, first change the input device to something that you are sure works. If the same problem continues, this might need attention by a qualified service technician.

looking into the back of the tv with the cover removed, there is 2 boards on the far left the run down the back of the screen. These are the Ysus buffer boards.They both plug into a larger board (Ysus). Make sure that the bottom buffer board is pushed into the Ysus properly and that the wired lead connecting the upper buffer board to the lower buffer board is pushed in firmly.If this doesnt solve the problem then you will most probably have a faulty lower buffer board.

Hello: Seem you are in zoom mode, try hitting the format putton on the televisions remote and if you are using a cable box and using HD check for a picture format or aspect button on it also. You will want to be on 1080i normal or stretched. The cable box and television will use different modes for aspect, try using only one of the remotes when changing aspect ratio buttons or screen size.

This is because full pixels of your TV is not getting invoked at the beginning .If you are able to view the picture as normal after 1 or 2 minutes, its fine.Else you need to call to service center and get this problem fixed.